Question: what is the main regulatory  text and the manifestation  of hypertext _ transfer_protocol?
Paraphrase: what is the fundamental regulatory text and the manifestation of hypertext _ transfer_protocol?
SPARQL (Wikidata): SELECT ?ans_1 ?ans_2 WHERE { wd:Q8777 wdt:P92 ?ans_1 . wd:Q8777 wdt:P1557 ?ans_2 }
Answer: client-server, WebDAV, request-response, WebDAV, client-server, HTTP/1.1, request-response, HTTP/1.1, client-server, Versioning Extensions to WebDAV, request-response, Versioning Extensions to WebDAV, client-server, WebDAV Ordered Collections Protocol, request-response, WebDAV Ordered Collections Protocol, client-server, WebDAV Access Control Protocol, request-response, WebDAV Access Control Protocol, client-server, PATCH Method for HTTP, request-response, PATCH Method for HTTP, client-server, WebDAV SEARCH, request-response, WebDAV SEARCH, client-server, HTTP State Management Mechanism, request-response, HTTP State Management Mechanism